Lifters
Lifters Do you know where I could buy some lifters, I know that at least one of my lifters are dead and I'd like to replace them, I'd like some performace ones if available but I'd like to keep DOD. Thanks
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I saw a used set on ebay a week or two ago, but you're going to have to use gm ones to keep DoD.
Just searched around a little and gm is redesigning dod lifters for the g8. Said something to the effect of just wait for the new design lifters. They will probably have a recall for ticking lifters.
Just searched around a little and gm is redesigning dod lifters for the g8. Said something to the effect of just wait for the new design lifters. They will probably have a recall for ticking lifters.
Last edited by neilownz; Apr 14, 2009 at 11:44 PM.
Did you actually read this somewhere??? My lifter chatter is HORRIBLE, and the $20 Lucas Oil Stabilizer did absolutely NOTHING to help it. I was so excited the day after I tried that stuff, and the next day it was back. 
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From: Fargo, ND
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lifters are what follow the profile of the cam shaft lobes for every valve. Then as the cam rotates the lifters rise, pushing up on the pushrods, that then act on the rockers that transfer the up motion into a downwards motion of pushing open the valve and overcoming the seat preasure of the valve spring. You can have solid or hydrollic lifters
Reguallar stapped steal rockers, machinced rockers, roller rockers.
Reguallar stapped steal rockers, machinced rockers, roller rockers.
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xTooltipElement
Service Information 2008 Pontiac G8 | G8 Service Manual | Document ID: 2197751
--------------------------------------------------------------------------------
#PIP4499: Short Duration Lifter Tick Noise On Cold Or Hot Restart - Aerated Oil In Filter - keywords BQMI - (Oct 7, 2008)
Subject: Short Duration Lifter Tick Noise on Cold or Hot Restart - Aerated Oil in Lifter
Models: 2009 Buick Lacrosse Super, Allure Super (Canada Only)
2007-2009 Buick Rainier
2007-2009 Cadillac CTS-V
2007-2009 Cadillac Escalade
2007-2009 Chevrolet Avalanche, Corvette, Express, Silverado, Suburban, Tahoe, Trail Blazer
2007-2009 Chevrolet Impala, Monte Carlo
2007-2009 GMC Envoy, Savana, Sierra, Yukon
2007-2009 Hummer H2
2008-2009 Hummer H3
2007-2008 Pontiac Grand Prix
2007-2009 Pontiac G8
2007-2009 Saab 97x
With Any of the Following V8 Engine RPOs:
L76, L92, L9H, LC9, LFA, LH6, LH8, LMG, LMF, LS2, LS3, LS4, LS7, LY2, LY5, or LY6
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment on a short duration lifter tick noise that occurs after start up and can last for up to several minutes. This may be the result of air in the high pressure chamber of the lifter affecting valve train lash. When this occurs, valve closing velocity is increased, which causes the noise. Air can be present in the lifter at shutdown due to an aerated oil condition, or it can be ingested into the lifter during a cold start. Oil aeration level, oil viscosity, time to achieve oil pressure, engine speed, and lifter design all play a part in whether lifter noise is observed. Once air gets into the high pressure chamber, it will slowly be expelled through the very tight clearance of the plunger and body.
Recommendation/Instructions:
If the SI diagnostics do not isolate the cause of this concern, perform a cylinder power balance test with the Tech 2 while listening to the noise.
If the noise is eliminated, or is greatly improved, each time a specific fuel injector is cancelled, there is most likely a concern with the clearance of the related piston pin or piston to cylinder wall.
If there is no change in the noise when canceling the fuel injectors with the Tech 2, the noise is most likely a result of the lifter concern described above. GM product engineering is continuing work with the lubrication group and the lifter suppliers to improve the robustness of the lifter hydraulic system. New lifter designs are currently under evaluation and this P.I. will be updated with additional information as soon as these updated lifters are available in GMSPO. In the meantime, replacing the lifters with the ones in GMSPO stock may repair this noise in many instances.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© 2008 General Motors Corporation. All rights reserved.
Service Information 2008 Pontiac G8 | G8 Service Manual | Document ID: 2197751
--------------------------------------------------------------------------------
#PIP4499: Short Duration Lifter Tick Noise On Cold Or Hot Restart - Aerated Oil In Filter - keywords BQMI - (Oct 7, 2008)
Subject: Short Duration Lifter Tick Noise on Cold or Hot Restart - Aerated Oil in Lifter
Models: 2009 Buick Lacrosse Super, Allure Super (Canada Only)
2007-2009 Buick Rainier
2007-2009 Cadillac CTS-V
2007-2009 Cadillac Escalade
2007-2009 Chevrolet Avalanche, Corvette, Express, Silverado, Suburban, Tahoe, Trail Blazer
2007-2009 Chevrolet Impala, Monte Carlo
2007-2009 GMC Envoy, Savana, Sierra, Yukon
2007-2009 Hummer H2
2008-2009 Hummer H3
2007-2008 Pontiac Grand Prix
2007-2009 Pontiac G8
2007-2009 Saab 97x
With Any of the Following V8 Engine RPOs:
L76, L92, L9H, LC9, LFA, LH6, LH8, LMG, LMF, LS2, LS3, LS4, LS7, LY2, LY5, or LY6
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment on a short duration lifter tick noise that occurs after start up and can last for up to several minutes. This may be the result of air in the high pressure chamber of the lifter affecting valve train lash. When this occurs, valve closing velocity is increased, which causes the noise. Air can be present in the lifter at shutdown due to an aerated oil condition, or it can be ingested into the lifter during a cold start. Oil aeration level, oil viscosity, time to achieve oil pressure, engine speed, and lifter design all play a part in whether lifter noise is observed. Once air gets into the high pressure chamber, it will slowly be expelled through the very tight clearance of the plunger and body.
Recommendation/Instructions:
If the SI diagnostics do not isolate the cause of this concern, perform a cylinder power balance test with the Tech 2 while listening to the noise.
If the noise is eliminated, or is greatly improved, each time a specific fuel injector is cancelled, there is most likely a concern with the clearance of the related piston pin or piston to cylinder wall.
If there is no change in the noise when canceling the fuel injectors with the Tech 2, the noise is most likely a result of the lifter concern described above. GM product engineering is continuing work with the lubrication group and the lifter suppliers to improve the robustness of the lifter hydraulic system. New lifter designs are currently under evaluation and this P.I. will be updated with additional information as soon as these updated lifters are available in GMSPO. In the meantime, replacing the lifters with the ones in GMSPO stock may repair this noise in many instances.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© 2008 General Motors Corporation. All rights reserved.
Interestingly enough...they omit the 2006 Impala...or just forgot that we got the DoD system, since they 6-cyl Impala with DoD began in '07.
No recall will ever come of this. It will be a customer satisfaction warranty issue, and it won't apply to those out of warranty (imo).
Also, since my chatter occurs any time the DoD is engaged, not just during startup, it's likely something out of the realm of this particular TSB.
No recall will ever come of this. It will be a customer satisfaction warranty issue, and it won't apply to those out of warranty (imo).
Also, since my chatter occurs any time the DoD is engaged, not just during startup, it's likely something out of the realm of this particular TSB.
Thank you panther very much that helps a lot 
Will you see any gain from doing new lifters? I am planning on, sometime this summer, redoing the valvetrain(rockers,pushrods,springs) should i do lifters as well?
Will you see any gain from doing new lifters? I am planning on, sometime this summer, redoing the valvetrain(rockers,pushrods,springs) should i do lifters as well?
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I cant say for sure on these motors. I dont remeber what kinda of lifters we have. If u swap to non DOD lifter that will give you peace of mind that they wont have that extra chance to fail. The biggest gain from swapping lifter woudl be tied with a cam swap.
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I think our cars nees supporting mods to gain power from cam swap. Different manifold/ manifold port, gearing in trans. .. Depends if you want to keep your DOD active. If the answer is yes then dont swap lifters. if answer is no then go ahead. cheaper to replace them while it is all apart. then to pull it all apart later.
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